Composition of matter to be used as a coating for grinding-surfaces.



1 able material roughened or a the rotation of the cylinder forei nmatter.

UNITED strATEs PATENT OFFICE.-

CHARLES ALBERT SHULTZ, OF PORTLAND, OREGON.

GOMPOSITIONOF MATTER TO BE USED AS A COATING FOR GRINDING-SURFACES.

1,011,504. No Drawing.

Specification of Letters Patent.

Application filed December 22, 1910. Serial No. 598,852.

Patented Dec. 12, 1911.

v To all whom it may concern:

Be it known that I, CHARLES ALBERT SHUL'rz', a citizen of the UnitedStates, and a resident of Portland, Multnomah county, State of Oregon,have invented a new and useful Improvement in Composition of Matter tobe Used as a Coating forGrinding- Surfaces, 'of which the following is aspecification.

My invention relates to the process of cleaning wheat. This work is nowgenerally performed, as well known, by'means of a machine comprising acase in which revolves a cylinder, the opposed faces of which casing andcylinder are covered with some suitproviding a more or less radingsurface, so that in will be removed from the wheat erry. It

has: been the custom to use a mineral composition as a covering orsurface for the walls of the casing or the cylinder, or both.

My invention particularly relates to such mineral surfacing, and has forits object to produce a compound which will set as hard as steel, willnot wear away in places, so as to 1 produce cavities,but to the contrawill wear 60 degrees given are by avoirdupois wei even, continuously; acompoun furthermore, which --will not become glazed, but maintainitseffective workin condition without change. To this end use a compoundformed of the following ingredients and in thepi'oportions stated, towitz Groundcarborundum 4 pounds. Ground emery cement... pound.

The rock salt brine being of the strength of 1300 deees Baum at atemperature of ahrenheit. All the proportions ht. To prepare therocksalt firine', I-take crushed rock salt and dissolve it in softdistilled water; or, where convenient, I dissolve the rock salt insteam. In either case, the solution obtained must be tested so as to beof the strength given. The ingredients are thoroughly intermingled in amortar, or other suitable utensil, and the resulting cement is appliedto the surface to be coated, so as to produce a layer 5 of an inchthick. Prolonged tests by me with a grain cleaning machine, of which theinterior wall of the casing was coated by my composition as given, haveshown that there is no uneven wearin awa of the surface nor andeterioration in its effective working condition though continuouslyused for months.

While I have described my composition as specially invented for use as asurfacing ortland cement, muriatic acid, and brine' of the strength of1300 degrees Baum at 60 degrees Fahrenheit, all proportions given beingavoirdupois weight.

2. The herein described'compositionof matter consisting of groundcarborundum four pounds, ground emery cement one-half ound, emery flourone pound,,ground- Portiand cement one-half ound, muriatic acid four'ounces, and roc salt brine of the strength of 1300 degrees Baum at 60degrees Fahrenheit, all proportions given bemg avoirdupois weight.

CHARLES ALBERT SHULTZ.

Witnesses: I

' Cnon. Lone, V O. O. MARTIN.

